Monu Dubey

ECE'27 | Proficient in C++ | DSA | Web Developer | Gen AI | Chasing Consistency #2026

[Monu Dubey @_monu____]

Taking 100 days of code Challenge #100DaysOfCode
posting regularly for accountability.
Targets:
#Strike DSA, #Strike Gen AI (JS too) -- Main frame.
Frontend Dev (React), LC daily problems+contests.
I will be sharing the notion notes i make
this is #day 0/100
@rohit_negi9

[Monu Dubey @_monu____]

@ShashankYa27693 67%ile pe cut off kaise clear hua bhai..🙂

[Monu Dubey @_monu____]

@Gabbar8244 X pe aisa v hota h👀

[Monu Dubey @_monu____]

@drabdulhameed07 Cirrhosis of liver

[Monu Dubey @_monu____]

48. Rotate Image
A 2D matrix is given, return the 90° clkwise rotated form.
1. Take Transpose
2. Reverse each row

[Monu Dubey @_monu____]

796.Rotate String
🔹Rotation = leftmost char goes to end (left shift).
🔹At most n distinct rotations exist for string length n.
🔹way1 : rotate up to n times + compare ⇒ O(n²), O(1).
🔹way2: if goal is in (s+s) ⇒ rotation exists⇒O(n) time.
https://t.co/TyaX7xDOlh

[Monu Dubey @_monu____]

796.Rotate String
🔹Rotation = leftmost char goes to end (left shift).
🔹At most n distinct rotations exist for string length n.
🔹way1 : rotate up to n times + compare ⇒ O(n²), O(1).
🔹way2: if goal is in (s+s) ⇒ rotation exists⇒O(n) time.
https://t.co/TyaX7xDOlh

[Monu Dubey @_monu____]

Initialize count = 0
For each x from 1 to n:Set changed = false

While x > 0:d = x % 10
If d is 3 or 4 or 7: mark invalid, stop and say “not good”
If d is 2 or 5 or 6 or 9: set changed = true
x = x / 10
If number was valid AND changed == true: count++

Return count

[Monu Dubey @_monu____]

Initialize count = 0
For each x from 1 to n:Set changed = false

While x > 0:d = x % 10
If d is 3 or 4 or 7: mark invalid, stop and say “not good”
If d is 2 or 5 or 6 or 9: set changed = true
x = x / 10
If number was valid AND changed == true: count++

Return count

[Monu Dubey @_monu____]

396. Rotate Function
• We need the max of F(k) = sum(i * arr_k[i]) over all rotations.
• Derive: F(k+1) = F(k) + Sum - n *lastElement(arr_k).
• Without rotating, lastElement(arr_k) = nums[n-1-k].
• Get S and F0 once, then iterate to get all F(k) in O(n) and track the maximum.

[Monu Dubey @_monu____]

396. Rotate Function
• We need the max of F(k) = sum(i * arr_k[i]) over all rotations.
• Derive: F(k+1) = F(k) + Sum - n *lastElement(arr_k).
• Without rotating, lastElement(arr_k) = nums[n-1-k].
• Get S and F0 once, then iterate to get all F(k) in O(n) and track the maximum.

[Monu Dubey @_monu____]

@raunakbharatii @Ayushi_sharma02 Nhi vai, ye sab kuch nhi hota

[Monu Dubey @_monu____]

@Shrii_6 Leetcode

[Monu Dubey @_monu____]

@Shrii_6 Html mai karlo😂

[Monu Dubey @_monu____]

@Pratikshak19332 @LeetCode @CSwithMIK Congratulations 🎉

[Monu Dubey @_monu____]

@KhushiSingh028 @CoderArmy Yeahh😇

[Monu Dubey @_monu____]

Your all efforts are being stored somewhere, even if you can't see any growth,
🔸They will all reflect someday
🔸And, it will look like an OVERNIGHT SUCCESS......

[Monu Dubey @_monu____]

@Pratikshak19332 @rohit_negi9 @CoderArmy Thanks 😇😇

[Monu Dubey @_monu____]

#lec 46: Problems on Next Greater Element
Strike DSA by @rohit_negi9 bhaiya
🔹Next Greater Element in Circular Array
🔹Next Smaller Element
🔹Previous Greater Element
🔹Next Smaller Element on Left
🔹Next Greater Element II
🔹Stock Span Problem
🔹Largest Rectangle in Histogram

[Monu Dubey @_monu____]

#lec 45: Problems on stack.
Strike DSA by @rohit_negi9 bhaiya.
Qs
🔹Make The Array beautiful
🔹String manipulation
🔹Minimum Add to Make Parentheses Valid
🔹Valid Parentheses
🔹Backspace String Compare
🔹Print Bracket Number

[Monu Dubey @_monu____]

#lec 48: Problems on Queue
Strike DSA by @rohit_negi9 bhaiya
Qs
🔹Generate Binary Numbers
🔹Implement Stack using Queues
🔹Implement Queue Using Stacks
🔹First negative in every window of size k

[Monu Dubey @_monu____]

#lec 47: Intro to Queue
Strike DSA by @rohit_negi9 bhaiya
Th
🔹Implementation by array
🔹Operations on Queue
🔹Need of circular Queue
🔹Implementation by LL
Qs
🔹Queue Reversal
🔹Reverse first K of a Queue
🔹Time Needed to Buy Tickets

[Monu Dubey @_monu____]

#lec 47: Intro to Queue
Strike DSA by @rohit_negi9 bhaiya
Th
🔹Implementation by array
🔹Operations on Queue
🔹Need of circular Queue
🔹Implementation by LL
Qs
🔹Queue Reversal
🔹Reverse first K of a Queue
🔹Time Needed to Buy Tickets

[Monu Dubey @_monu____]

#lec 46: Problems on Next Greater Element
Strike DSA by @rohit_negi9 bhaiya
🔹Next Greater Element in Circular Array
🔹Next Smaller Element
🔹Previous Greater Element
🔹Next Smaller Element on Left
🔹Next Greater Element II
🔹Stock Span Problem
🔹Largest Rectangle in Histogram

[Monu Dubey @_monu____]

@MananCodes123 @rohit_negi9 yeah sure, done from my side.

[Monu Dubey @_monu____]

Taking 100 days of code Challenge #100DaysOfCode
posting regularly for accountability.
Targets:
#Strike DSA, #Strike Gen AI (JS too) -- Main frame.
Frontend Dev (React), LC daily problems+contests.
I will be sharing the notion notes i make
this is #day 0/100
@rohit_negi9

[Monu Dubey @_monu____]

@Shrii_6 Inko IIT ki flex ki zarurat hi nhi h🫠

[Monu Dubey @_monu____]

@nitesh_singh5 Please share further details, I am interested.